The ladies in the Bridal Party will be wearing floor length dresses, and the Groomsmen will wear suits. Male guests might like to wear a suit or a sport jacket and ladies a holiday party dress or a pretty church dress.
We are planning contra/swing dancing for after dinner, so you might consider bringing more comfortable shoes to change into if you would like to dance.
The desert can cool down quickly, so you might also want to bring an extra layer for after dark.